| // Copyright 2014 PDFium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #include "public/fpdf_ppo.h" |
| |
| #include <memory> |
| |
| #include "fpdfsdk/include/fsdk_define.h" |
| #include "third_party/base/stl_util.h" |
| |
| class CPDF_PageOrganizer { |
| public: |
| using ObjectNumberMap = std::map<FX_DWORD, FX_DWORD>; |
| CPDF_PageOrganizer(); |
| ~CPDF_PageOrganizer(); |
| |
| FX_BOOL PDFDocInit(CPDF_Document* pDestPDFDoc, CPDF_Document* pSrcPDFDoc); |
| FX_BOOL ExportPage(CPDF_Document* pSrcPDFDoc, |
| std::vector<FX_WORD>* pPageNums, |
| CPDF_Document* pDestPDFDoc, |
| int nIndex); |
| CPDF_Object* PageDictGetInheritableTag(CPDF_Dictionary* pDict, |
| CFX_ByteString nSrctag); |
| FX_BOOL UpdateReference(CPDF_Object* pObj, |
| CPDF_Document* pDoc, |
| ObjectNumberMap* pObjNumberMap); |
| FX_DWORD GetNewObjId(CPDF_Document* pDoc, |
| ObjectNumberMap* pObjNumberMap, |
| CPDF_Reference* pRef); |
| }; |
| |
| CPDF_PageOrganizer::CPDF_PageOrganizer() {} |
| |
| CPDF_PageOrganizer::~CPDF_PageOrganizer() {} |
| |
| FX_BOOL CPDF_PageOrganizer::PDFDocInit(CPDF_Document* pDestPDFDoc, |
| CPDF_Document* pSrcPDFDoc) { |
| if (!pDestPDFDoc || !pSrcPDFDoc) |
| return FALSE; |
| |
| CPDF_Dictionary* pNewRoot = pDestPDFDoc->GetRoot(); |
| if (!pNewRoot) |
| return FALSE; |
| |
| // Set the document information |
| CPDF_Dictionary* DInfoDict = pDestPDFDoc->GetInfo(); |
| if (!DInfoDict) |
| return FALSE; |
| |
| CFX_ByteString producerstr; |
| producerstr.Format("PDFium"); |
| DInfoDict->SetAt("Producer", new CPDF_String(producerstr, FALSE)); |
| |
| // Set type |
| CFX_ByteString cbRootType = pNewRoot->GetStringBy("Type", ""); |
| if (cbRootType.Equal("")) { |
| pNewRoot->SetAt("Type", new CPDF_Name("Catalog")); |
| } |
| |
| CPDF_Object* pElement = pNewRoot->GetElement("Pages"); |
| CPDF_Dictionary* pNewPages = |
| pElement ? ToDictionary(pElement->GetDirect()) : nullptr; |
| if (!pNewPages) { |
| pNewPages = new CPDF_Dictionary; |
| FX_DWORD NewPagesON = pDestPDFDoc->AddIndirectObject(pNewPages); |
| pNewRoot->SetAt("Pages", new CPDF_Reference(pDestPDFDoc, NewPagesON)); |
| } |
| |
| CFX_ByteString cbPageType = pNewPages->GetStringBy("Type", ""); |
| if (cbPageType.Equal("")) { |
| pNewPages->SetAt("Type", new CPDF_Name("Pages")); |
| } |
| |
| CPDF_Array* pKeysArray = pNewPages->GetArrayBy("Kids"); |
| if (!pKeysArray) { |
| CPDF_Array* pNewKids = new CPDF_Array; |
| FX_DWORD Kidsobjnum = -1; |
| Kidsobjnum = pDestPDFDoc->AddIndirectObject(pNewKids); |
| |
| pNewPages->SetAt("Kids", new CPDF_Reference(pDestPDFDoc, Kidsobjnum)); |
| pNewPages->SetAt("Count", new CPDF_Number(0)); |
| } |
| |
| return TRUE; |
| } |
| |
| FX_BOOL CPDF_PageOrganizer::ExportPage(CPDF_Document* pSrcPDFDoc, |
| std::vector<FX_WORD>* pPageNums, |
| CPDF_Document* pDestPDFDoc, |
| int nIndex) { |
| int curpage = nIndex; |
| std::unique_ptr<ObjectNumberMap> pObjNumberMap(new ObjectNumberMap); |
| int nSize = pdfium::CollectionSize<int>(*pPageNums); |
| for (int i = 0; i < nSize; ++i) { |
| CPDF_Dictionary* pCurPageDict = pDestPDFDoc->CreateNewPage(curpage); |
| CPDF_Dictionary* pSrcPageDict = pSrcPDFDoc->GetPage(pPageNums->at(i) - 1); |
| if (!pSrcPageDict || !pCurPageDict) |
| return FALSE; |
| |
| // Clone the page dictionary |
| for (const auto& it : *pSrcPageDict) { |
| const CFX_ByteString& cbSrcKeyStr = it.first; |
| CPDF_Object* pObj = it.second; |
| if (cbSrcKeyStr.Compare(("Type")) && cbSrcKeyStr.Compare(("Parent"))) { |
| if (pCurPageDict->KeyExist(cbSrcKeyStr)) |
| pCurPageDict->RemoveAt(cbSrcKeyStr); |
| pCurPageDict->SetAt(cbSrcKeyStr, pObj->Clone()); |
| } |
| } |
| |
| // inheritable item |
| CPDF_Object* pInheritable = nullptr; |
| // 1 MediaBox //required |
| if (!pCurPageDict->KeyExist("MediaBox")) { |
| pInheritable = PageDictGetInheritableTag(pSrcPageDict, "MediaBox"); |
| if (!pInheritable) { |
| // Search the "CropBox" from source page dictionary, |
| // if not exists,we take the letter size. |
| pInheritable = PageDictGetInheritableTag(pSrcPageDict, "CropBox"); |
| if (pInheritable) { |
| pCurPageDict->SetAt("MediaBox", pInheritable->Clone()); |
| } else { |
| // Make the default size to be letter size (8.5'x11') |
| CPDF_Array* pArray = new CPDF_Array; |
| pArray->AddNumber(0); |
| pArray->AddNumber(0); |
| pArray->AddNumber(612); |
| pArray->AddNumber(792); |
| pCurPageDict->SetAt("MediaBox", pArray); |
| } |
| } else { |
| pCurPageDict->SetAt("MediaBox", pInheritable->Clone()); |
| } |
| } |
| // 2 Resources //required |
| if (!pCurPageDict->KeyExist("Resources")) { |
| pInheritable = PageDictGetInheritableTag(pSrcPageDict, "Resources"); |
| if (!pInheritable) |
| return FALSE; |
| pCurPageDict->SetAt("Resources", pInheritable->Clone()); |
| } |
| // 3 CropBox //Optional |
| if (!pCurPageDict->KeyExist("CropBox")) { |
| pInheritable = PageDictGetInheritableTag(pSrcPageDict, "CropBox"); |
| if (pInheritable) |
| pCurPageDict->SetAt("CropBox", pInheritable->Clone()); |
| } |
| // 4 Rotate //Optional |
| if (!pCurPageDict->KeyExist("Rotate")) { |
| pInheritable = PageDictGetInheritableTag(pSrcPageDict, "Rotate"); |
| if (pInheritable) |
| pCurPageDict->SetAt("Rotate", pInheritable->Clone()); |
| } |
| |
| // Update the reference |
| FX_DWORD dwOldPageObj = pSrcPageDict->GetObjNum(); |
| FX_DWORD dwNewPageObj = pCurPageDict->GetObjNum(); |
| |
| (*pObjNumberMap)[dwOldPageObj] = dwNewPageObj; |
| |
| UpdateReference(pCurPageDict, pDestPDFDoc, pObjNumberMap.get()); |
| ++curpage; |
| } |
| |
| return TRUE; |
| } |
| |
| CPDF_Object* CPDF_PageOrganizer::PageDictGetInheritableTag( |
| CPDF_Dictionary* pDict, |
| CFX_ByteString nSrctag) { |
| if (!pDict || nSrctag.IsEmpty()) |
| return nullptr; |
| if (!pDict->KeyExist("Parent") || !pDict->KeyExist("Type")) |
| return nullptr; |
| |
| CPDF_Object* pType = pDict->GetElement("Type")->GetDirect(); |
| if (!ToName(pType)) |
| return nullptr; |
| if (pType->GetString().Compare("Page")) |
| return nullptr; |
| |
| CPDF_Dictionary* pp = ToDictionary(pDict->GetElement("Parent")->GetDirect()); |
| if (!pp) |
| return nullptr; |
| |
| if (pDict->KeyExist((const char*)nSrctag)) |
| return pDict->GetElement((const char*)nSrctag); |
| |
| while (pp) { |
| if (pp->KeyExist((const char*)nSrctag)) |
| return pp->GetElement((const char*)nSrctag); |
| if (!pp->KeyExist("Parent")) |
| break; |
| pp = ToDictionary(pp->GetElement("Parent")->GetDirect()); |
| } |
| return nullptr; |
| } |
| |
| FX_BOOL CPDF_PageOrganizer::UpdateReference(CPDF_Object* pObj, |
| CPDF_Document* pDoc, |
| ObjectNumberMap* pObjNumberMap) { |
| switch (pObj->GetType()) { |
| case CPDF_Object::REFERENCE: { |
| CPDF_Reference* pReference = pObj->AsReference(); |
| FX_DWORD newobjnum = GetNewObjId(pDoc, pObjNumberMap, pReference); |
| if (newobjnum == 0) |
| return FALSE; |
| pReference->SetRef(pDoc, newobjnum); |
| break; |
| } |
| case CPDF_Object::DICTIONARY: { |
| CPDF_Dictionary* pDict = pObj->AsDictionary(); |
| auto it = pDict->begin(); |
| while (it != pDict->end()) { |
| const CFX_ByteString& key = it->first; |
| CPDF_Object* pNextObj = it->second; |
| ++it; |
| if (!FXSYS_strcmp(key, "Parent") || !FXSYS_strcmp(key, "Prev") || |
| !FXSYS_strcmp(key, "First")) { |
| continue; |
| } |
| if (pNextObj) { |
| if (!UpdateReference(pNextObj, pDoc, pObjNumberMap)) |
| pDict->RemoveAt(key); |
| } else { |
| return FALSE; |
| } |
| } |
| break; |
| } |
| case CPDF_Object::ARRAY: { |
| CPDF_Array* pArray = pObj->AsArray(); |
| FX_DWORD count = pArray->GetCount(); |
| for (FX_DWORD i = 0; i < count; ++i) { |
| CPDF_Object* pNextObj = pArray->GetElement(i); |
| if (!pNextObj) |
| return FALSE; |
| if (!UpdateReference(pNextObj, pDoc, pObjNumberMap)) |
| return FALSE; |
| } |
| break; |
| } |
| case CPDF_Object::STREAM: { |
| CPDF_Stream* pStream = pObj->AsStream(); |
| CPDF_Dictionary* pDict = pStream->GetDict(); |
| if (pDict) { |
| if (!UpdateReference(pDict, pDoc, pObjNumberMap)) |
| return FALSE; |
| } else { |
| return FALSE; |
| } |
| break; |
| } |
| default: |
| break; |
| } |
| |
| return TRUE; |
| } |
| |
| FX_DWORD CPDF_PageOrganizer::GetNewObjId(CPDF_Document* pDoc, |
| ObjectNumberMap* pObjNumberMap, |
| CPDF_Reference* pRef) { |
| if (!pRef) |
| return 0; |
| |
| FX_DWORD dwObjnum = pRef->GetRefObjNum(); |
| FX_DWORD dwNewObjNum = 0; |
| const auto it = pObjNumberMap->find(dwObjnum); |
| if (it != pObjNumberMap->end()) |
| dwNewObjNum = it->second; |
| if (dwNewObjNum) |
| return dwNewObjNum; |
| |
| CPDF_Object* pDirect = pRef->GetDirect(); |
| if (!pDirect) |
| return 0; |
| |
| CPDF_Object* pClone = pDirect->Clone(); |
| if (!pClone) |
| return 0; |
| |
| if (CPDF_Dictionary* pDictClone = pClone->AsDictionary()) { |
| if (pDictClone->KeyExist("Type")) { |
| CFX_ByteString strType = pDictClone->GetStringBy("Type"); |
| if (!FXSYS_stricmp(strType, "Pages")) { |
| pDictClone->Release(); |
| return 4; |
| } |
| if (!FXSYS_stricmp(strType, "Page")) { |
| pDictClone->Release(); |
| return 0; |
| } |
| } |
| } |
| dwNewObjNum = pDoc->AddIndirectObject(pClone); |
| (*pObjNumberMap)[dwObjnum] = dwNewObjNum; |
| if (!UpdateReference(pClone, pDoc, pObjNumberMap)) { |
| pClone->Release(); |
| return 0; |
| } |
| return dwNewObjNum; |
| } |
| |
| FPDF_BOOL ParserPageRangeString(CFX_ByteString rangstring, |
| std::vector<FX_WORD>* pageArray, |
| int nCount) { |
| if (rangstring.GetLength() != 0) { |
| rangstring.Remove(' '); |
| int nLength = rangstring.GetLength(); |
| CFX_ByteString cbCompareString("0123456789-,"); |
| for (int i = 0; i < nLength; ++i) { |
| if (cbCompareString.Find(rangstring[i]) == -1) |
| return FALSE; |
| } |
| CFX_ByteString cbMidRange; |
| int nStringFrom = 0; |
| int nStringTo = 0; |
| while (nStringTo < nLength) { |
| nStringTo = rangstring.Find(',', nStringFrom); |
| if (nStringTo == -1) |
| nStringTo = nLength; |
| cbMidRange = rangstring.Mid(nStringFrom, nStringTo - nStringFrom); |
| int nMid = cbMidRange.Find('-'); |
| if (nMid == -1) { |
| long lPageNum = atol(cbMidRange); |
| if (lPageNum <= 0 || lPageNum > nCount) |
| return FALSE; |
| pageArray->push_back((FX_WORD)lPageNum); |
| } else { |
| int nStartPageNum = atol(cbMidRange.Mid(0, nMid)); |
| if (nStartPageNum == 0) |
| return FALSE; |
| |
| ++nMid; |
| int nEnd = cbMidRange.GetLength() - nMid; |
| if (nEnd == 0) |
| return FALSE; |
| |
| int nEndPageNum = atol(cbMidRange.Mid(nMid, nEnd)); |
| if (nStartPageNum < 0 || nStartPageNum > nEndPageNum || |
| nEndPageNum > nCount) { |
| return FALSE; |
| } |
| for (int i = nStartPageNum; i <= nEndPageNum; ++i) { |
| pageArray->push_back(i); |
| } |
| } |
| nStringFrom = nStringTo + 1; |
| } |
| } |
| return TRUE; |
| } |
| |
| DLLEXPORT FPDF_BOOL STDCALL FPDF_ImportPages(FPDF_DOCUMENT dest_doc, |
| FPDF_DOCUMENT src_doc, |
| FPDF_BYTESTRING pagerange, |
| int index) { |
| CPDF_Document* pDestDoc = CPDFDocumentFromFPDFDocument(dest_doc); |
| if (!dest_doc) |
| return FALSE; |
| |
| CPDF_Document* pSrcDoc = CPDFDocumentFromFPDFDocument(src_doc); |
| if (!pSrcDoc) |
| return FALSE; |
| |
| std::vector<FX_WORD> pageArray; |
| int nCount = pSrcDoc->GetPageCount(); |
| if (pagerange) { |
| if (!ParserPageRangeString(pagerange, &pageArray, nCount)) |
| return FALSE; |
| } else { |
| for (int i = 1; i <= nCount; ++i) { |
| pageArray.push_back(i); |
| } |
| } |
| |
| CPDF_PageOrganizer pageOrg; |
| pageOrg.PDFDocInit(pDestDoc, pSrcDoc); |
| return pageOrg.ExportPage(pSrcDoc, &pageArray, pDestDoc, index); |
| } |
| |
| DLLEXPORT FPDF_BOOL STDCALL FPDF_CopyViewerPreferences(FPDF_DOCUMENT dest_doc, |
| FPDF_DOCUMENT src_doc) { |
| CPDF_Document* pDstDoc = CPDFDocumentFromFPDFDocument(dest_doc); |
| if (!pDstDoc) |
| return FALSE; |
| |
| CPDF_Document* pSrcDoc = CPDFDocumentFromFPDFDocument(src_doc); |
| if (!pSrcDoc) |
| return FALSE; |
| |
| CPDF_Dictionary* pSrcDict = pSrcDoc->GetRoot(); |
| pSrcDict = pSrcDict->GetDictBy("ViewerPreferences"); |
| if (!pSrcDict) |
| return FALSE; |
| |
| CPDF_Dictionary* pDstDict = pDstDoc->GetRoot(); |
| if (!pDstDict) |
| return FALSE; |
| |
| pDstDict->SetAt("ViewerPreferences", pSrcDict->Clone(TRUE)); |
| return TRUE; |
| } |
